La roy bartlett



' UNirnD STATES PATENT Ormes.

LA ROY BARTLETT, OF ST. LOUIS, MISSOURI, ASSIGNOR OF ONEIIALF TO HENRY H. WELLllIAN, OF SAME PLAGE.

NUT-TAPPING MACHINE.,

SPECIFICATION forming part of Letters` Patent No. 283,745, dated August 28, 18.83.

AApplication filed December l, 1882. (No model.)

To @ZZ whom, it may concern;

Beit known that l, LA ROY BARrLEr-r, of St. Louis, Missouri, have made a new and useful Improvement in Nut-Tapping Machines, of which the following is a full, clear, and exact description, reference being had to the annexed drawings, making part of this speciiication, in which Figure l is a side elevationfpartly in sec- 1 tion, 4of the improved machine; Fig. 2, a.sec tional elevation, upon an enlarged scale, of that part of theninachine immediately connccted with the upper end of the tap; and Fig. 3, a view similar to that of Fig. 2, the tap being detached from its holder.

The same letters denote the same parts.

By means of the present improvement the tap is automatically detached from the spindle while the spindle is in motion.

The improvement further relates to means for feeding the nuts to the tap.

`A represents the spindle of the machine. At its lower end the spindle has a socket, B. The spindle and socket may be in one piece. As shown, the socket is detachable Afrom the spindle.

i the C represents a pawl or catch pivoted at c in o the socket B.

The upper end of the catch is pressed outward by means of the spring c'.

D represents' a sleeve sliding freely in a vertical direction upon the socket B. The pin d, iixed to the socket B, and moving in the slot d in the sleeve, prevents the sleeve from slipping oiin the socket B. i

E is a bearing, in which thespindle A ro tates.

F lrepresents a tap. It is inserted in the socket, the socket d being squared to prevent the tap from turning therein, and the tap being upheld in the socket by means of the catch C, the point or hook c2 of the catch engaging in lthe groove j", near the upper end of the tap.

The tap, thus connected with the spindle, rotates therewith. The usual means (not here shown, as its construction is well understood) is employed for imparting the desired rotary motion to the spindle and tap.

I-I is a ta'nk holding oil and water. The tank is suitably supported in position beneath the tap. The support, however, is not shown,

as its special construction is inconsequential to my present purpose.

I is a tube for holding the nuts tobe tapped.

J is a nut in position for being tapped.`

J J`l J3, &c., represent the succeeding nuis to be tapped.

K represents a plunger for moving the nuts into position to be tapped. l

L represents a lever pivoted at Zwa iixed part ofthe structure. A rod, M, connects the lever L and the bell-crank lever N. This last-named lever is pivoted at n to some suit able fixture, nl, of the frame of the machine, and the lower arm, u, of the lever is forked to embrace the rod O.

I I are collars, the collar P being loose upon the rod O, and the collar I being fixed upon the rod O, and at the desired point i thereon, by means of the small setserew p.

S represents a spiral spring encircling the rod O, and at its lower end bearing upon the collar P.

S is a spiral spring encircling the rod M, and bearing at one end against the fixed point s of the frame, and at its other end bearing against the collar s', which is fixed upon the rod M. i

R represents an arm which is attached to the rod O, and which, at its outer end, i', is forked to embrace and engage with the spindie A, the spindle being suitably grooved at a to receiveQthe end r of the arm R. This lastnamed connection enables the spindle to be raised and lowered by means of the rod O. The rod O, at its lower end, o, is jointed to the lever or treadle Q, which in turn is pivoted at q to aiixed fulcrum, q. The operators foot is applied to .the treadle at q2.

Il is a receptacle suitably supported in the machine, in the immediate vicinity of the tank H and tube I. ceptacle for the blank nuts before being put into the tube I.

In operating the machine the nuts are placed in the tube I, as shown in Fig. l'. The oper ator then places his foot upon the treadle Q, and operates the same until a nut has been transferred from the-bottom ofthe tube I into It may be used as a re IOC) - causes the rod Oto be lifted, and lthis in turn,

' tap a second nut, J.

through the parts P P S N M L, causes the plunger K to be moved across the bottom of the tube I. This movement of the plunger K causes vthe nut to" be transferred from the position occupied by the nut J 2 into the position of the nut J A second movement of thetreadle causes the nut J to be transferred into the position of the nut J, and so on. The spindle A, being in motion, is, by means of the treadle Q, rod O, and arm R, raised sufliciently to enable the attendant to insert the tap Fin the socket B, as shown in Fig. 2, in which position the sleeve D has been slipped downward upon the socket B sufficiently to enable the point or hook cl ofthe catch C to engage in the groove f in the tap. rIhe attendant then removes his foot from the treadle Q, whereupon the spindle and tap drop downward, the tap entering the nut J and forming the thread therein in the usual manner. When this nut J has been tapped,

the operator, by means of the treadle Q, lifts' the spindle and tap, the nut J being upon the shank f/ of the tap. Whenthe point of the tap has been raised a short distance, and before the f spindle and tap have been raised to their upward limit, the collar P pressesagainst the lower arm, n2, ofthe bell-crank lever N, and transmits motion to the rod M, lever L, and the plunger K, the plungerK thus operating to push another nut, J into position for tapping. The attendant then removes his foot from the treadle Q, whereupon the spindle and tap drop again and 'As soon as the tap begins to out the nut, the pressure exerted by the collar P upon the lower arm of the bell-crank lever N being relieved, thespring S forces the plunger K back to its original position, in which position it is ready for bringing the next nut into place beneath the tap. As the plunger K is withdrawn from the lower end of the tube I the blanks in the tube I drop downward, the lowest one coming into position for being forced toward the tap. The operation is repeated until the shank f has been strung with the tapped nuts, as indicated by the broken lines in Fig. l. When the nuts havebeen thus strung upon the tap upward as far thereon as is practicable, and so as to come in contact with the lowerend of the sleeve D, the dropping of the spindle causes the sleeve D to slip upward upon the socket B. This upward movement of the sleeve forces the upper end of the catch C inward into the socket and the lower end of the catch outward sufficiently to detach the lower end of the catch from the groovef in the tap. The tap is thus automatically detached from the socket B. The attendant now removes the tap with the tapped nuts thereon, and, having removed the nuts from the tap, the tap is inserted again in the socket B and the operation is repeated. It is thus seenr that the operation is accomplished without arresting the rotation of the spindle.

l. The spindle A and the socket B, thevertical pawl C, pivoted in the socket B, and having hooked end c2, thespring c', connected with said pawl, thesleeve D, and the tap F, having groovef, all constructed and operating as described, whereby the upward movement of the sleeve, acting on the projecting edge ofpawl C, will disengage the pawl from the tap, while the downward movement of the sleeve permits the engagement of the pawl on the tap, all as set forth-and described. p

2. rlhe combination of the treadle Q, the rod '0, the arm R, the spindle A, the socket B, the

catch C, the sleeve D, and the tap F, substantially as described. n

3. The combination oi the treadle Q, the rods O M, the collarsv P P, the spring S, the levers N L, and the plunger K, as and for the purpose described. f

4. The combination ofthe treadle Q, the rods O M, the collars P P s', the springs S S', the levers N L, and the plunger K, substantially asdescribed. Y

5. The combination of the treadle Q, the rods O M, the collars P P s, the springs S S', the

levers N L, the plunger K, the tube I, the arm R, the spindle A, the socket B, the catch C, the sleeve D, and thek tap F, substantially as described. y

LA ROY BAR'ILETT. Witnesses: l f

C. D. MooDv,

SAML. S. BOYD. 

